Amazing image Johnn!I know exactly what you mean about 'the box', and now with the ability to explore and render images from a potentially infinite number of hybrid combinations, we are really being spoiled for choice.As you said, it's this thing of wanting to see what's 'round the corner' that makes it almost addictive!

Question: have you done modifications to the pixelbenderscript yourself to be able to render mandelboxes or is it an unreleased script by subblue, can't find it on his site...?I have seen your experiments...

Yes, I did it myself..but it's a 'port' based on Knighty's code.It's available originally for ATI's GPU (RenderMonkey). I'm thinking to do a plain GLSL version for Xcode/Quartz-composer..I dunno yet if I can manage..it's something really new for me.I did a 'port' for Tacitus as well; but maybe I prefer pxbndr.

::..I would to try with Cuda or play with a Cuda version..but Nvidia does not make things easy; they force us to buy new cards.